问答题

沙漠中最常见的东西是什么？

答案：正确答案：沙子。

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In order to protect workers, an employer cannot terminate the labor contract with an employee even if the employee seriously violates the rules and regulations of the employer.

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单项选择题

更换青霉素批号或者超过多长时间时应该重新为病人做皮内试验: A.
1天
B.
2天
C.
3天
D.
4天